Answer:
The answer to your question is $9.5
Step-by-step explanation:
Data
Large pizza = L
Medium pizza = m
Write equation for both situations
Situation 1     5L + 2m = 81.5
Situation 2    4L + 3m = 78.5
Solve the system of equation by elimination
Multiply situation 1 by -3 and situation 2 by 2
                     -15L  - 6m = -244.5
                        8L + 6m =  157
                       -7L           = -87.5
Solve for L                  L = -87.5/-7
                                    L = $12.5 
Substitute L in Situation 1 to find m
                      5(12.5) + 2m = 81.5
                        62.5 + 2m = 81.5
                                     2m = 81.5 - 62.5
                                     2m = 19
                                       m = 19/2
                                       m = $ 9.5
The prize of a medium pizza is $9.5
 
        
             
        
        
        
Answer: f^-1(x)=-7x+3 maybe ? i think 
Step-by-step explanation:
 
        
             
        
        
        
To determine the amount of water in the first 8 beakers, you will subtract the 19 ml that are in the 9th beaker from the total to see how much water was actually put into the first 8 beakers.
91 ml - 19 ml = 72 ml.
The 72 ml are divided evenly between 8 beakers.
72/8 = 9 ml
There would be 9 ml of water in each of the first 8 beakers.
        
             
        
        
        
So you can you the Pythagorean theorem to solve this problem.
if each side of the square is a certain length x, then the square is made up of two right triangles.
the sides adjacent to the right angle are length x while the hypoteneus is the diagonal whcih measures 36 feet.
a^2 + b^2 = c^2
x^2 + x^2 = 36^2
2x^2 = 1296
x^2 = 648
x = 25.456
area of a square = x^2 = 648 ft^2